应用注射器采集空气样品时,采样体积一般不大于()
A.10ml
B.50ml
C.80ml
D.100ml
E.200ml
参考答案:D
—
—He is tall and has big eyes.
A.Who’s that boy? B.What does the boy look like? C.Where is the boy from?
下列植物中,不属于针叶类的是()。
A.圆柏
B.罗汉松
C.仙人掌
D.池杉