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【单选题】
8051单片机的定时器T1用作定时是( )A.
由内部时钟频率定时，一个时钟周期加1
B.
由内部时钟频率定时，一个机器周期加
C.
由外部时钟频率定时，一个时钟周期加1
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【单选题】以下描述错误的是( )
A.
磷霉素与β-内酰胺类(头孢菌素、碳青霉烯类)、万古霉素、氨基糖苷类、四环素类、氟喹诺酮类联合用药均具协同作用
B.
对多药耐药的不动杆菌、铜绿假单胞菌感染的治疗，多粘菌素可发挥重要作用。但多粘菌素单用效果差，往往需要联用，如与利福平、阿奇霉素、碳青霉烯、头孢他啶、替加环素联用
C.
对于革兰氏阳性菌，替加环素联合利福平对耐万古霉素粪肠球菌、屎肠球菌均表现出较高的协同作用 D:替加环素属于窄谱抗菌药
【简答题】在汽车行驶中，传动轴发抖，放松驻车制动器，用手来回晃动驻车制动盘有松旷感，而拉紧驻车制动器，转动传动轴无明显动感，则为（）所致。
【单选题】Today's weather isn't as cold as it was yesterday,( )( )( ) ?
A.
was it
B.
wasn't it
C.
is it
D.
isn't it
【单选题】How was Dr Hill when he heard the young girl's answer?
A.
He wasn't happy.
B.
He wasn't hungry.
C.
He was very thankful (感谢的).
【单选题】Though the doctor __________ his patient to give up smoking, yet he wasn't able to __________ him to do so. [ ]
A.
adviced, persuade
B.
advised, persuade
C.
adviced, suggest
D.
advisied, suggest
【单选题】The patient said he wasn’t feeling _____________ that morning.
A.
much well
B.
more better
C.
any better
D.
more well
【单选题】The patient insisted that he _______ ill and _______ to the hospital. A) wasn't, wasn't sent B) wasn't, shouldn't be sent C) shouldn't be, wasn't sent D) shouldn't be, shouldn't be sent
A.
B.
C.
D.
D
【单选题】（原创题）The patient insisted that he _____ ill, and _____back home at once.
A.
wasn’t , was sent
B.
isn’t , be sent
C.
wasn’t , be sent
D.
should be , send
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