设备安装中，对环境温度需严格控制的是()。
A.喂料设备
B.铸造设备
C.收尘设备
D.精密设备
参考答案：D
解析：本题考查影响设备安装精度的因素。
在已浇注混凝土强度未达到( )N/mm2以前，不得在其上踩踏或安装模板及支架等。
A．1.5
B．2
C．2.5
D．1.2
用所给词语的适当形式填空。
1. Some people in _____ (west ) countries don't like the number 13.
2. Mr. Black gave me some _____ ( advice ) on how to learn English.
3. _____ ( eat ) too much is bad for your health.
4. People who _____ ( be ) too stressed out and angry may have too much yang.
5. Listen! Mary is practicing _____ ( play ) the piano.
