读下图，回答问题。 （1）写出图中字母代表的地理事物的名称： 临海：A____

在△ABC中，CB=8，CA=5，S_△=12，则cos2c=______．

小题1: My uncle works in a shoe   ▲  (工厂) in the north of China.

小题2:The famous d   ▲   have worked for a week , the program has been designed .

小题3:If you can answer all the questions     ▲    (正确地)，you will be the best .

小题4: I want to chat with my friends     ▲    (on the Internet) at weekends .

小题5: Guangdong is in the s   ▲  part of China.

小题6:They clapped with         ▲       (兴奋) while the stars were singing .

小题7:Please     ▲  (打印) the picture on the paper for me.

测绘学的二级学科有大地测量学、（）、（）、（）和（）。

用耐火粘土砖砌咱们小的炉子，使用温度在（）℃以下时，通常靠砖缝泥浆和空隙的压缩来补偿加热时的体积膨胀。

A.400

B.500

C.600

D.800

工业水压力必须大于（）Mpa才能开工。

A.0.1

B.1

C.0.2

D.0.4