问题
选择题
溶酶体具有细胞内消化功能，其内部水解酶的最适pH在5.0左右，下列叙述错误的是[ ]
A．溶酶体内的水解酶是由核糖体合成的
B．溶酶体执行功能时伴随其膜组分的更新
C．细胞质基质中的H+被转运到溶酶体内需消耗能量
D．正常生理状态下溶酶体对自身机体的细胞结构无分解作用
答案
答案：D
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溶酶体具有细胞内消化功能，其内部水解酶的最适pH在5.0左右，下列叙述错误的是[ ]
A．溶酶体内的水解酶是由核糖体合成的
B．溶酶体执行功能时伴随其膜组分的更新
C．细胞质基质中的H+被转运到溶酶体内需消耗能量
D．正常生理状态下溶酶体对自身机体的细胞结构无分解作用
答案：D
Some students cheat(作弊) because they’re busy or lazy and they want to get good grades without (41) the time studying. Other students might feel that they can’t (42) the test without cheating. Even when there seems to be a “good reason” for cheating, it isn’t a good (43). A student who thinks cheating is the only way to pass a test (44) to talk with the teacher and his or her parents so they can find some better ways together. Talking about these problems and (45) them out will help feel better than cheating. If a student gets (46) cheating, the teacher may give a “(47)” on the test, send him or her to the head teacher’s (48), and call his or her parents. Worse than the (49) grade may be the feeling of having disappointed those people, (50) parents and teachers. A parent may worry that you are not an (51) person and a teacher might watch you more (52) the next time you’re taking a test. There are plenty of reasons why a kid shouldn’t cheat, but some students have already cheated. If that’s you, it’s (53) too late to stop cheating. Cheating can become a (54), but a student is always able to act better and make better (55). It might help to talk the problem over with a parent, teacher, or friend.
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