【单选题】Which statement is the main idea of the third paragraph? Which statement is the main idea of paragraph 3?
A.
Temperature will continue to rise.
B.
There will be great change in our environment.
C.
Future generations will live a different life.
【单选题】氨的合成反应是一个气固相催化反应,若以最快反应速度达到最大转化率为优化目标,在T—x图上存在一条最优温度曲线(或称最适宜温度曲线)。因为该反应是
【单选题】Which statement is the main idea of the second paragraph? Which statement is the main idea of paragraph 2?
A.
Human activities producing more wealth leads to global warming.
B.
Some vested interest groups don't want to stop such human activities.
C.
Prospects look bleak as no real efforts are made.
【单选题】绘制( )零件时,一般以工作位置和最能确定反映形体特征的一面作为主视图。
【单选题】Which statement is the main idea of paragraph 1? Which statement is the main idea of the first paragraph?
A.
It is difficult to predict climate change.
B.
Human activities are resposible for global warming.
C.
There is a dispute about global warming.
【单选题】学生上完一节课后,不受该课内容的影响,自觉做好上第二节不同内容课的准备。这种注意品质是( )。