天平调平后，称取5g食盐，发现指针偏右，应该（ ）
A．向右移动游码
B．向左移动游码
C．减少食盐
D．添加食盐
答案：D
We are taught that a business letter should be written in a formal style ______ in a personal one.
A．rather than
B．other than
C．better than
D．less than
盾构始发准备工作，洞门凿除钻孔监测用风钻钻（）个观测孔。
A、6
B、7
C、8
D、9
