物理电磁屏敝
参考答案:
利用金属体,把电磁场限制在一定的空间,或把电磁场强度削弱到一定数量级的措施。
I have been living in London for more than ten years, so I have ________ good knowledge of this city.
A./
B.the
C.a
D.an
农民入股农村资金互助社应当具备的条件有哪些?