表达式Left("how are you",3)的值是().

AX=INT(RND*(N-M+1))+M

BX=Int(Rnd*n)+m

CX=Int(Rnd*m)+n

DX=Int(Rnd*(n-m)+m

A0

B1

C-1

D随机数

ALtrim

BRtrim

CTrim

DMid

A8.76

B7.8

C6

D6.67

A8

B""

C1

D0

A-1

B0

C1

D2

A,

B:

C、

D;

ATrue

BFalse

C-1

D以上都不对

AA1和a1

BSUM和SUMMARY

CAVER和AVERAGE

DA1和A_1

A[0,1]

B[1,10]

C[1,9]

D[0,9]