【单选题】The overall purpose of this passage is to______
A.
demonstrate the cultural differences between America and Europe
B.
indicate ways to improve the American image abroad
C.
describe the general impression of foreign visitors on America
D.
criticize some behaviors of American taxi drivers
【简答题】Some people viewed the findings with caution, noting that a cause relationship between passive smoking and cancer remains ________. A) to be shown B) to have shown C) to have been shown D) being shown
【单选题】欲配制pH=9.00的缓冲溶液,最好选用下列缓冲系中的( )。
A.
邻苯二甲酸(pKa1Θ=2.89;pKa2Θ=5.51)
【简答题】A.Why stars move so quickly. B.Why few stars have planets. C.Why stars aren't moving toward one another. D.Why stars haven't moved farther apart.
【单选题】欲配制pH=9.00的缓冲溶液,最好应选用( )。
【多选题】关于听证程序的说法正确的是( )
A.
当事人要求听证的,应当在警察机关告知后3日内提出
D.
警察机关应当在听证的7日前,通知当事人听证的时间、地点