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【单选题】
In the absence of optimism, we are left with nothing but critics, naysayers, and prophets of doom. When a nation expects the worst from its people and institutions, and its experts focus exclusively on faults, hope dies. Too many people spend too much tie looking down rather than up, finding fault with their country's political institutions, economic system, edncational establishment, religious organizations, and—worst of all—with each other. Faultfinding expends so much negative energy that nothing is left over for positive action. It takes courage and strength to solve the genuine problems that afflict every society. Sure, there well always be things that need fixing. But the question is, Do you want to spend your time and energy tearing things down or building them up? The staging of a Broadway show could illustrate my point. Let's say a new production is about to open. A playwright has polished the script, investor have put up the money, and the theater ahs been rented. A director alas been chosen, actors have been auditioned and selected, and the cast has been rehearsing for weeks. Set, lighting, and sound engineers have been hard at work. By the time opening night arrives, nearly a hundred people have labored tirelessly—all working long hours to make magic for their audience. On opening night, four or five critics sit in the audience. If they pan it, the play will probably close in a matter lf days or weeks. If they praise it, the production could go on for a long and successful run. In the end, success or failure might hinge on the opinion of a single person—someone who might be in a bad mood on opening night! What's wrong with this scene? In one sense, nothing. Critics have a legitimate role. The problem arises when we make critics our heroes or put them in control of our fate. When we empower the critic more than the playwright, something is wrong. It is much easier to criticize than to create. When we revere the critics of society, we eventually become a society of critics, and when that happens, there is no mom left for constructive optimism. According to the author, critics usually ______.
A.
ignore minor imperfections
B.
overemphasize flaws
C.
see both sides of a coin
D.
pin their hopes on improvements
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举一反三
【单选题】举证时限不少于( )日。
A.
30
B.
20
C.
10
D.
15
【单选题】在电动机多地点控制电路中,启动按钮应该()联控制线路中,停止按钮应该()联控制电路中。
A.
串,串
B.
并,并
C.
串,并
D.
并,串
【简答题】我国医学检验取得了飞跃的发展,主要表现在哪些方面?
【简答题】3G网络参考模型中,各个网络单元的功能?
【简答题】在大型设备中,为了操作方便,常常要求在多个地点对同一台电动机进行操作控制,这种控制方式称为_________。多地控制电路中,要求启动按钮要_________,停止按钮要_________。
【多选题】下面有关 II型糖尿病患者的叙述不正确的有
A.
血浆胰岛素及 C- 肽含量低,糖耐量曲线呈低平状态
B.
起病较慢
C.
遗传因素其重要作用
D.
不需胰岛素治疗
E.
典型病例常见于肥胖中年人
【多选题】在六大种常用水泥中,早期强度较高、抗冻性能较好的水泥有()
A.
硅酸盐水泥
B.
普通水泥
C.
复合水泥
D.
矿渣水泥
E.
粉煤灰水泥
【判断题】要实现电动机的多地控制,多个地点的启动按钮的常开触头应串联在电路中,多个地点的停止按钮的常闭触头应并联在电路中。
A.
正确
B.
错误
【简答题】在电动机多点(多地)控制线路中,其实质就是将在不同地点的多个启 动按钮 联接,多个停止按钮 联接。
【简答题】以下不构成无限循环的语句或语句组是( )。A. n=0;do {++n;} while (n B. n=0;while (1) { n++;} C. n=10; while (n); {n--;} D. for(n=0,i=1; ; i++) n+=i;
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