EPC总承包商主要靠自己的力量承担工程的设计、采购和施工任务，而只将少量工作由( )完成。
A．总包商
B．分包商
C．施工商
D．发包商
参考答案：B
We are sure you can pass the exam ______ you work hard. [ ]
A. successful as long as
B. successful as well as
C. successfully as long as
D. successfully as far as
常用的转子式流速仪包括（）。
A、旋浆式
B、旋杯式
C、旋叶式
D、超声波
