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【单选题】
细胞接受阈刺激,Na + 通道打开,引起Na + 离子通透性大大增加,瞬间大量Na + 离子流入细胞内,致使膜电位减少乃至消失,此过程称为质膜的A.
极化
B.
极化
C.
超极化
D.
还原
E.
反极化
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举一反三
【简答题】数据库系统的安全机制主要有哪三种?简述其基本概念。
【单选题】Suppose that interest rates rise unexpectedly. Suppose also that IBM announces that revenues from last quarter were down, but that the decline was exactly what the public and analysts had expected. ...
A.
Only the interest rate rising
B.
Only the revenue announcement
C.
Both the interest rate rising and the revenue announcement
D.
Neither the interest rate rising nor the revenue announcement
【多选题】下列关于视图作用描述正确的是:
A.
简化用户的操作
B.
使用户能以多种角度看待同一数据
C.
对重构数据库提供了一定程度的逻辑独立性
D.
视图机制提高了系统的安全性
【简答题】儒家讲的经济就是()。
【单选题】听力原文：W: I want to pay you for that long distance call I made. But I suppose you haven't gotten you phone bill yet. M: Oh, but I have. Q: What does the man mean? (15)
A.
He has got the phone bill.
B.
His calls weren't included.
C.
The woman doesn't need to pay for it.
D.
He has received a long-distance call.
【简答题】材料 为什么要独尊一家呢?因为统一的帝国需要统一的思想,这是秦始皇就已经意识到的。而且,始皇的焚书,武帝的尊儒,动机和说法都一样:天下大乱,皆因思想自由,言论不一。...... 儒学,为什么就合适作统治思想呢?因为儒学是维护君主制度的。......儒家则不同,道为王道,政为仁政,制为礼制,治为德治。也就是说,儒学维护君主制度是讲道理的,也有人情味。这样的统治,人民能够接受。人民能接受,政权就稳...
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