【单选题】对硅酸盐水泥强度起决定性的矿物成分是( )。 A.
C3S、C3A B.
C2S、C3A C.
C4AF、C3S D.
C3S、C2S

单项选择题The money market is the market in which longer term debt instruments (generally those with original maturity terms of one year or greater) and equity instruments are traded. （ ）

单项选择题一台机器空转，对外不作功，这时机器的效率 。

单项选择题咽侧体属于昆虫的（ ）系统组成部分。

单项选择题最近望しくないことばかり起こっています。

单项选择题在自定义函数中调用其它函数与在主函数中调用其它函数语法格式是相同的。( )

单项选择题与房水生成有关的是 A. 虹膜上皮 B. 睫状体上皮 C. 角膜内皮 D. 角膜上皮 E. 视网膜色素上皮层

多项选择题关于心功能不全的防治中，正确的是（ ） A. 可用β肾上腺素受体阻滞剂防止交感神经对衰竭心肌的恶性刺激 B. 限制钠盐的摄入 C. 适当使用利尿剂 D. 改善心肌的收缩性能 E. 吸氧

单项选择题Why did Jeff Bezons choose Amazon to be the name of his store? A. He wished his store would be the biggest store in the world just like the Amazon river is the longest river in the world. B. He liked the pronounciation of the word Amazon. C. He chose the word Amazon accidentally.

单项选择题隐框或半隐框玻璃幕墙的玻璃面板与其周边铝合金框架之间应采用下列哪种材料进行粘结？

单项选择题While in the process of posting from the journal to the ledger a company failed to post a $500 debit to the Office Supplies account. The effect of this error will be that: A、The Office Supplies account balance will be overstated. B、The trial balance will not balance. C、The error will overstate the debits listed in the journal. D、The total debits in the trial balance will be larger than the total credits. E、The error will overstate the credits listed in the journal.