起重指挥信号种类可分为口笛信号、手势信号、（）信号。
A、语言
B、表情
C、姿势
D、旗语
参考答案：C
He always _____ TV in the evening. He _____ listening to the radio. [ ]
A. watch, don't like
B. watches, doesn't like
C. watching, don't like
D. watch, doesn't like
下列哪种配伍，面粉蛋白质的生物价值最高（）
A.面粉+鸡蛋
B.面粉+牛奶
C.面粉+肉粉
D.面粉+豆粉
E.面粉+玉米粉
