He must have had an accident, or he ______ then.
A. would have been here
B. had to be here
C. should be here
D. would be here
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The manager tried to wave aside these issues as ______ details that would be settled later.
A. versatile
B. trivial
C. preliminary
D. alternate
聚证特点错误的是
A. 部位固定不移
B. 无积块
C. 腹中气时聚时散
D. 发有休止
E. 痛无定处
对所有类型的癫痫都有效的广谱抗癫痫药是
A. 乙琥胺
B. 苯巴比妥
C. 丙戊酸钠
D. 苯妥英钠
E. 安定
Not only ______ people to send words, music, and codes to any part of the world, it can also be used to communicate far into space.
A. enabled by radio B. radio enables
B. C. does radio enable
C. D. has radio enabled