皮皮学，免费搜题
登录
搜题
【单选题】
下列属于原核生物细胞中核糖体沉降系数是( )A.
70S
B.
90S
C.
60S
D.
80S
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】Computers have been getting more popular ______.
A.
because the Americans want to appear rich
B.
because they are smaller, cheaper and easier to use
C.
because they can help Americans do everything
D.
because 'they can type letters
【简答题】Computers have been designed to ( ) information and ( ) problems.
【单选题】The home computer industry has been growing rapidly in the United States for the last ten years . Computers used to be large, expensive machines that were very difficult to use . But scientists and te...
A.
work rapidly
B.
be large and expensive
C.
be easy to use
D.
be used for fun
【单选题】执行PUSH ACC指令,MCS—51完成的操作是( )
A.
SP+1一>SP (ACC)一>(SP)
B.
(ACC)一>(SP) SP-1一>SP
C.
SP-1一>SP (ACC)一>(SP)
D.
(ACC)一>(SP) SP十1一>SP
【单选题】Before he arrived at the airport, the plane______.
A.
would get off
B.
got off
C.
had got off
D.
has got off
【单选题】Computers have been taught to act and speak, but the problem is how to【C1】______them to listen --to understand spoken words.【C2】______speech recognition systems have been used by workers who need to e...
A.
build
B.
make
C.
get
D.
develop
【单选题】Computers have been getting more popular because______ .
A.
they can type letters
B.
they can help Americans do everything
C.
the Americans want to appear rich
D.
they are smaller, cheaper and easier to use
相关题目：
参考解析：
知识点：
题目纠错 0
发布
