用于加热液体的仪器有( )
①试管 ②漏斗 ③蒸发皿 ④烧杯 ⑤量筒 ⑥集气瓶.
A.①③④
B.③④⑥
C.①②⑤⑥
D.①③④⑤
答案:A
Recently our government policymakers are very ________ about the rapidly rising food costs.[ ]
A.upset
B.confused
C.concerned
D.conscious
领用、上缴的现金必须由()清点,经过清点的现金方可加钞或入库。
A.单人;
B.双人;
C.现金中心;
D.领缴人