She could hardly()a smile.
A.impress
B.depress
C.compress
D.suppress
参考答案:D
_______ is easy for many students to _______ to school.
A. It , get B this, arrive C. That, get D. He, arrive
下列关于氧气性质的叙述中,错误的是( )
A.通常状况下氧气是无色无味的气体
B.氧气具有氧化性和可燃性
C.氧气不易溶于水
D.氧气的密度比空气略大