未知题型 一个较完善的指令系统应包含._____类指令， _____类指令，____类指令， 程序控制类指令，1/0 类指令，字符串类指令，系统控制类指令。

单项选择题 球体运动都是受什么因素的影响？

未知题型 One study on high school English language textbooks in Iran found that male characterizations were used as much as _____13_____ % of the time.（请填写数字）