We finished all of the food at a sitting. The underlined part means ______.
A. at one time
B. in time
C. on time
D. at a time
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The decision of the Supreme Court was that the government has used its power too ______ under the Act.
A. broadly
B. expensively
C. covertly
D. liberally
The prisoner was questioned for three hours but he remained ______ throughout his trial.
A. blind
B. deaf
C. dumb
D. inarticulate
Such a decision would ______ a huge political risk in the midst of the presidential campaign.
A. result
B. assure
C. entail
D. accomplish
光激励荧光体中,常掺入___________以改变荧光体的结构和物理特性
AP+
B. Eu2+
Cu2+
D. TI2+
E. Se2+