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【单选题】
单片机中使用MOVX A,@R1指令 寻址数据存贮器1050H单元。
A.
能直接
B.
不能
C.
与P2口配合能
D.
与P1口配合能
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举一反三
【简答题】设函数y=kx 2 +(2k+1)x+2(k为任意实数) (1)求证:不论k为何值,该函数图象都过点(0,2)和(-2,0); (2)若该函数图象与x轴只有一个交点,求k的值.
【单选题】It was _____ he came bank from Africa that wear _________ he met the girl he would like to marry.
A.
when then
B.
not until
C.
not until that
D.
only when
【单选题】如图甲所示的电路,当闭合开关S后,两个电压表指针偏转均如图乙所示,则电阻R1和R2两端的电压分别为 ( )
A.
8 V   2 V
B.
10 V   2 V
C.
2 V   8 V
D.
2 V 10 V
【简答题】设函数y=a x -b(a>0,a≠1)的图象过点(1,2),函数y=log b (x+a)(b>0,b≠1)的图象过点(0,2),则a+b等于______.
【单选题】It was ________ he came back from Africa that year ________ he met the girl he would like to marry. [     ]
A.
when; then
B.
not; until
C.
not until; that
D.
only; when
【简答题】阅读理解。 John was waiting for the girl whose heart he knew, but whose face he didn't, the girl with the rose. Thir months ago, in a Florida library he took a book off the shell and found himself inte...
【单选题】Was it from the lake ________ he often went fishing ________ he saved the drowning girl?
A.
that; that
B.
where; where
C.
where; that
D.
that; where
【简答题】(本小题满分10分) 设函数 ( 为任意实数) 小题1:(1)求证:不论 为何值,该函数图象都过点(0,2)和(-2,0); 小题2:(2)若该函数图象与 轴只有一个交点,求 的值.
【单选题】He was so deep in love with that girl that he was willing to trade everything () her love.
A.
with
B.
to
C.
from
D.
for
【简答题】在如图所示的电路中,电阻R1=30Ω.开关S闭合后,两电流表的示数分别为0.3A和0.8A.求: (1)通电1min内,电流经过R1、R2时所做的功W1、W2. (2)通电1min内,整个电路消耗的电能.
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