switch语句中的表达式的数据类型可以是long。
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In order to discover the nature and rules of underlying language system, what the linguist has to do first is to ___and ___language facts, which are found to display some ___, and ___ are made about them; then he ___some ___ about the language structure. But the hypotheses thus formed have to be checked repeatedly against the observed facts to fully prove their ___.
Linguistics studies particular language, not language in general.
A. 对
B. 错
下列哪些是药物的抗菌机制
A. 抑制细菌细胞壁的合成
B. 降低胞浆膜的通透性
C. 抑制细菌蛋白质的合成
D. 影响细菌叶酸的代谢
E. 影响核酸的代谢
从小的环境来说, ()、()、()()等是影响村落通风的重要因素。
A. 山谷风
B. 水陆风
C. 季风
D. 街巷风