地形图上表示的（）属于注记符号。
A.控制点
B.房屋
C.水稻田
D.河流的流向
参考答案：D
—_____ your sister have a computer?
—Sorry, I don't think she has _____.[ ]
A. Do; it
B. Does; one
C. Do; one
D. Does; it
现有95%乙醇1000ml，要配制70%乙醇，需加入灭菌蒸馏水（）
A.310ml
B.320ml
C.357ml
D.370ml
E.410ml
