皮皮学，免费搜题
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搜题
【单选题】
下列溶剂属于极性溶剂的是A.
聚乙二醇
B.
丙二醇
C.
乙醇
D.
液状石蜡
E.
二甲基亚砜
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The realization that the most economically significant sanctions cannot survive poses a new danger: that effective sanctions will be allowed to lapse, ______ a series of token measures.
A.
leaving in place
B.
setting aside
C.
taking into account
D.
making room for
【简答题】__________。 [A]poses [B]produces [C] makes [D] brings
【单选题】某PC机的声卡在处理声信息时,采样频率为44KHz,A/D转换精度为16位。若连续采集2分钟的声音信息,则 在不进行压缩编码的情况保存这段声音,需要的存储空间近()。
A.
88KB
B.
176KB
C.
11MB
D.
83MB
【简答题】The population which is top—heavy with older people poses a problem to _______.
【单选题】图示稳压电路,稳压管 V 1 与 V 2 相同,其稳压值 U Z =5.3V 、正向压降 0.7V ,输出电压 U 0 为 ( )
A.
1.4V
B.
4.6V
C.
5.3V
D.
6V
【简答题】A.It poses a challenge to seniors. B.It saves both time and money. C.It is childish and u NPR ofessional. D.It is cool and convenient.
【单选题】The energy produced by the sun ______.
A.
is easy to store
B.
poses similar problems to the other newer energy sources
C.
poses very few problems
D.
poses different problems from the other newer energy sources
相关题目：
【单选题】图示稳压电路,稳压管 V 1 与 V 2 相同,其稳压值 U Z =5.3V 、正向压降 0.7V ,输出电压 U 0 为 ( )
A.
1.4V
B.
4.6V
C.
5.3V
D.
6V