皮皮学，免费搜题
登录
搜题
【单选题】
温室气体是引起全球气候变暖的主因,其中,_____是最主要的人为温室气体,对总的温室气体贡献率高达63.5%。
A.
二氧化碳
B.
甲烷
C.
一氧化碳
D.
氮氧化物
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
They are forced to retire at an earlier age.
B.
They have to cope with reduced pensions.
C.
Their spending power has increased to record high.
D.
Their confidence has dropped to the lowest level.
查看完整题目与答案
【单选题】Economists say this layoff is Cleveland's final readjustment to a service economy. Identify the rhetorical device involved here.
A.
innuendo
B.
euphemism
C.
downplayer
D.
stereotype
查看完整题目与答案
【简答题】作痰液细菌学检查时,收集标本应注意:A. 清晨留取痰液 B、留取前用清水漱口 C、留取用力由深部咳出的痰液 D、标本立即送检 E、用清洁培养器收集痰液
查看完整题目与答案
【单选题】. Economist often say there is no such thing as a freelunch. What do economists mean when theysay such a thing?
A.
a.    Peoplenever offer a lunch for free.
B.
b.    Even ifsomeone literally offers you a free lunch, there is an opportunity cost to theresources that are used to produce your free lunch.
C.
c.    Someresources cause significant negative externalities.
D.
d.    Economists,in this case, are talking about common resources.
查看完整题目与答案
【单选题】Economist often say there is no such thing as afree lunch. What do economists mean whenthey say such a thing?
A.
Economists,in this case, are talking about common resources.
B.
Someresources cause significant negative externalities.
C.
Even ifsomeone literally offers you a free lunch, there is an opportunity cost to theresources that are used to produce your free lunch.
D.
Peoplenever offer a lunch for free.
查看完整题目与答案
【单选题】听力原文： A new United Nations report is predicting economic growth in Latin America this year will be slower than anticipated. The U. N, Economic Commission for Latin America and the Caribbean released a...
A.
3 percent
B.
3.8 percent
C.
5 percent
D.
4 percent L
查看完整题目与答案
【单选题】听力原文： A new United Nations report is predicting economic growth in Latin America this year will be slower than anticipated. The U. N, Economic Commission for Latin America and the Caribbean released a...
A.
55
B.
65
C.
60
D.
45
查看完整题目与答案
【多选题】作痰液细菌学检查时,收集标本应注意
A.
清晨留取痰液
B.
留取前用清水漱口
C.
留取用力由深部咳出的痰液
D.
标本立即送检
E.
用清洁培养器收集痰液
查看完整题目与答案
【单选题】复合材料的优点有（ ）。①强度高，②质量轻，③耐高温，④耐腐蚀
A.
①④
B.
②③
C.
①②④
D.
①②③④
查看完整题目与答案
【单选题】听力原文： A new United Nations report is predicting economic growth in Latin America this year will be slower than anticipated. The U. N. Economic Commission for Latin America and the Caribbean released a...
A.
3 percent
B.
8 percent
C.
5 percent
D.
4 percent
查看完整题目与答案
相关题目：
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
They are forced to retire at an earlier age.
B.
They have to cope with reduced pensions.
C.
Their spending power has increased to record high.
D.
Their confidence has dropped to the lowest level.
查看完整题目与答案
【单选题】Economists say this layoff is Cleveland's final readjustment to a service economy. Identify the rhetorical device involved here.
A.
innuendo
B.
euphemism
C.
downplayer
D.
stereotype
查看完整题目与答案
【简答题】作痰液细菌学检查时,收集标本应注意:A. 清晨留取痰液 B、留取前用清水漱口 C、留取用力由深部咳出的痰液 D、标本立即送检 E、用清洁培养器收集痰液
查看完整题目与答案
【单选题】. Economist often say there is no such thing as a freelunch. What do economists mean when theysay such a thing?
A.
a.    Peoplenever offer a lunch for free.
B.
b.    Even ifsomeone literally offers you a free lunch, there is an opportunity cost to theresources that are used to produce your free lunch.
C.
c.    Someresources cause significant negative externalities.
D.
d.    Economists,in this case, are talking about common resources.
查看完整题目与答案
【单选题】Economist often say there is no such thing as afree lunch. What do economists mean whenthey say such a thing?
A.
Economists,in this case, are talking about common resources.
B.
Someresources cause significant negative externalities.
C.
Even ifsomeone literally offers you a free lunch, there is an opportunity cost to theresources that are used to produce your free lunch.
D.
Peoplenever offer a lunch for free.
查看完整题目与答案
【单选题】听力原文： A new United Nations report is predicting economic growth in Latin America this year will be slower than anticipated. The U. N, Economic Commission for Latin America and the Caribbean released a...
A.
3 percent
B.
3.8 percent
C.
5 percent
D.
4 percent L
查看完整题目与答案
【单选题】听力原文： A new United Nations report is predicting economic growth in Latin America this year will be slower than anticipated. The U. N, Economic Commission for Latin America and the Caribbean released a...
A.
55
B.
65
C.
60
D.
45
查看完整题目与答案
【多选题】作痰液细菌学检查时,收集标本应注意
A.
清晨留取痰液
B.
留取前用清水漱口
C.
留取用力由深部咳出的痰液
D.
标本立即送检
E.
用清洁培养器收集痰液
查看完整题目与答案
【单选题】复合材料的优点有（ ）。①强度高，②质量轻，③耐高温，④耐腐蚀
A.
①④
B.
②③
C.
①②④
D.
①②③④
查看完整题目与答案
【单选题】听力原文： A new United Nations report is predicting economic growth in Latin America this year will be slower than anticipated. The U. N. Economic Commission for Latin America and the Caribbean released a...
A.
3 percent
B.
8 percent
C.
5 percent
D.
4 percent
查看完整题目与答案