股票交易可分为( )
A.现货交易
B.期货交易
C.期权交易
D.股票指数交易
E.贴现交易
参考答案:A,B,C,D
—Can you go to the mall with me this Sunday?
— _____, I'll have a dinner with my grandparents.[ ]
A. Sure
B. OK
C. Sorry
D. It doesn't matter.
在黏土中连续沉桩时,由于土中水的作用,会使桩周摩阻力( )。
A.不变B.略有减小C.大为减小D.大为增大