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【多选题】
求函数【图片】的导数,如下哪些算式正确A.
等式 两边微分得 ,
B.
令 , 则
C.
方程即 图象是上半圆 , 过点 的半径斜率为 , 切线与半径垂直 , 切线斜率
D.
令 , 则 ,
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【简答题】Nowadays more and more people are concerned about the pollution.（英译中）
【单选题】Nowadays, _______ cars are more and more popular.
A.
electronic
B.
electric
C.
electrical
D.
electricity
【简答题】Nowadays, more people mainly travel for______.
【单选题】阅读下面的短文，回答下列五道题。 “温室效应”与“阳伞效应” 在近百万年的地球气温变迁中，严寒的冰河期和温暖的间冰期曾交替出现。在冰河期，陆地冰川遍地，海水相对减少，海平面比今天要低100～145米。而在间冰期，冰川融化，海平面比今天要高15～30米。今天，人类居住的地球冰河尚未完全消失，可认为是处于冰河期的末尾。现在令人关注的是：地球今后是继续变暖使冰河期彻底结束而迎接间冰期到来呢?还是再次从寒...
A.
人类对地球气温变化的干预能力极其渺小。
B.
人类活动可使大气中的二氧化碳、尘埃、水汽等增加，改变大气的成分，从而造成局部气温的变化。
C.
人类活动通过改变大气的成分打破地球的热平衡，从而导致全球气温的变化。
D.
人类活动造成“温室效应”和“阳伞效应”，直接导致全球气候的剧烈变化。
【简答题】_____________. “And nowadays, with more and more people moving to the country, individuals want to put an exclusive finishing touch to their properties. It has been a boost to crafts like mines,” ［A］G...
【简答题】Nowadays more and more people are advised to arrange for insurance _______ they or their family members need medical treatment. A so that B. in order that C in case ...
【单选题】Nowadays more and more people are interested in arranging time for exercises and ______ to release the stress caused by the fast pace and pressure of their lives.
A.
meditation
B.
registration
C.
mediation
D.
illumination
【单选题】More and more people nowadays are exercising, quitting tobacco, losing weight and becoming more health-conscious.
A.
given in
B.
giving out
C.
giving away
D.
giving up
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