GFM电池能否安装在阳光直射的地方?工作环境是否允许有机溶剂或腐蚀性气体存在?
参考答案:
不能安装在阳光直射的地方。安装环境不允许有有机溶剂或腐蚀性气体存在。
根据句意和提示完成句子。
1. Has it reached ______ (火星) yet?
2. The journey has taken ______ (数月).
3. We haven't found life on other______ (行星) yet.
4. The sun and its planet are called ______ (太阳系).
5. It's an ______ (不载人的) mission.
6. The______ (宇航员) have discovered many interesting things ______.
7. The m______ (信息) has been around the country about three years.
已知一核素半衰期为2天,剂量为8mCi,请问8天后为()
A.2mCi
B.0.5mCi
C.1mCi
D.0mCi
E.1.5mCi