促进水钠排泄的激素是
A．人绒毛膜促性腺激素B．人胎盘生乳素C．雌激素D．孕激素E．前列腺素
参考答案：B
This kind of food _____ cool, clean and dry according to the instruction. [ ]
A. should be carried
B. must be put
C. should be placed
D. must be kept
我国当前仍然是严重的缺乏人才
