皮皮学，免费搜题
登录
搜题
【单选题】
长波紫外线(ultraviolet A, UVA)的波长是：()A.
100~400 nm
B.
280~320 nm
C.
310~360 nm
D.
320~400 nm
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】The question of whether war is inevitable is one which has concerned many of the world's great writers. Before considering this question, it will be useful to introduce some related concepts. Conflict...
A.
like animal fights, competition is a necessity and war is inevitable
B.
competition becomes war when it grows more and more fierce
C.
when social entities serve one another, opposition means cooperation
D.
while competition is unavoidable, war is not a necessary outcome
【简答题】计税依据是指计算应纳税额的依据或标准，即根据什么来计算纳税人应缴纳的税额，也就是纳税的客体。 （ ）
【单选题】— Which season do you like _____, spring, summer, fall or winter? — Oh, that's a hard question. [ ]
A.
good
B.
better
C.
best
【单选题】The question of whether war is inevitable is one which has concerned many of the world's great writers. Before considering this question, it will be useful to introduce some related concepts. Conflict...
A.
argue fur the similarities between animal societies and human societies
B.
smooth out the conflicts in human societies
C.
distinguish between two kinds of opposition
D.
summarize the characteristic features of opposition and cooperation
【简答题】试归纳总结原子自发辐射、受激吸收和受激辐射三个过程的基本特征。
【单选题】诊室里应用氟凝胶后，医生要叮嘱患者
A.
半小时内不进食，不漱口
B.
回去漱口以清除口内残余氟
C.
每天早晚应用含氟牙膏
D.
要少吃甜食，多吃蔬菜
E.
三个月后再作第二次
【简答题】The question of whether war is inevitable is one which has concerned many of the world’s great writers. Before 36 this question, it will be useful to introduce some 37 concepts. Conflict, 38 a...
相关题目：