皮皮学，免费搜题
登录
搜题
【单选题】
细菌膜的主要成分是A.
肽聚糖
B.
多聚核苷酸
C.
磷壁酸
D.
多肽或多糖
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】In the third paragraph, 'three weeks of round-the-clock effort' means ______.
A.
for three weeks the hospital was taking in SARS patients without stopping
B.
Dr. i worked day and night for three weeks, trying to get SARS under control
C.
for three weeks Dr. i did not have any time to sleep, trying hard to fight the new disease
D.
After three weeks' hard work to control SARS, the hospital superior thought it was time to stop the clock
【单选题】An un-loader is installed on an air compressor to _____.
A.
bypass the high pressure stage to the low pressure stage on 100% of the air compressors in service
B.
pr excessive inter-stage pressure buildup
C.
control compressor discharge pressure
D.
remove all but the frictional load during starting
【单选题】—How often do you surf the Internet? —_____. [ ]
A.
Three times a week
B.
A week three times
C.
Three weeks a time
【单选题】听力原文：M: I was away for three weeks, but it seems like three days. W: So you must have had a very good time in Guilin. What do we know about the man?
A.
He enjoyed himself in Guilin.
B.
He didn't like traveling in Guilin.
C.
He spent three days in Guilin.
【多选题】关于循环左移指令和循环右移指令,说法正确的是:( )。
A.
循环左移指令ROL使目标操作数中各位数据向左循环移n位，最后将从最高位移出的数据存于进位标志M8022中
B.
循环右移指令ROR使目标操作数中各位数据向右循环移n位，最后将从最低位移出的数据存于进位标志M8022中。
C.
执行这两条指令时，如果目标操作数为位组合元件，则只有K4或K8才有效
D.
移位指令只能使用脉冲执行形式或者边沿执行条件
【单选题】______ (W)word came that three Chinese astronauts had been successfully sent into ______ space.
A.
The; a
B.
/; /
C.
A; /
D.
/; the
【多选题】NK细胞表面表达十分复杂的受体谱,以此识别正常和异常的细胞,并调控其活化、增殖及其他功能,这些受体包括
A.
抑制性受体
B.
活化性受体
C.
黏附分子受体
D.
细胞因子受体
E.
趋化因子受体
【单选题】The ____ stage air compressors are widely used on board the ship.
A.
single
B.
II
C.
III
D.
multiple
相关题目：
参考解析：
知识点：
题目纠错 0
发布
