以下主诉描述正确的是 ()
A.月经停闭3年
B.月经过多5天
C.痛经3年
D.每次月经期间及月经以后发热,五心烦热,口干咽燥1年
E.小产3次
参考答案:A
The exercises are extremely difficult, but half of the class_____ them ahead of time. [ ]
A. has already finished
B. will finish
C. have already finished
D. finishes
下列物质出入植物体不需要通过气孔的是[ ]
A.水蒸气
B.氧气
C.二氧化碳
D.无机盐