煤粉的细度一般用（）来表示。
A.公制
B.英制
C.公制和英制
D.筛分分析
参考答案：D
A funded investor has a short-term investment returning a 7 percent return. The borrowing costs are 20 basis points above the reference rate. If the T-bill rate is 3 percent and the LIBOR rate is 3.5 percent, what is the investor’s current profit on this investment()
A.3.3%.
B. 1.5%.
C. 3.8%.
为避免整车报废，绞车离合器与刹车不可（）使用。
A、长时间
B、相继
C、同时
D、分开
