轻中度低渗性脱水首先补充的液体是
A．5%碳酸氢钠
B．0.45%氯化钠
C．0.9%氯化钠
D．5%氯化钠
E．11.2%乳酸钠
参考答案：C
The flu is believed _______ by viruses that like to reproduce in the cells inside the human nose and throat.
A．causing
B．being caused
C．to be caused
D．be have caused
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