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问题 单项选择题

下列关于合同解除的叙述中，正确的是( )。

A．合同解除适用于无效合同

B．合同解除的条件必须是法定的

C．合同解除的条件必须是约定的

D．合同解除必须有解除行为

答案

参考答案：D

解析： 合同的解除是指合同有效成立后，当具备合同解除条件时，因当事人一方或双方的意思表示而使合同关系自始消灭或向将来消灭的行为。合同解除的特点是：①合同解除适用于有效成立的合同；②合同解除必须具备一定的条件 (这些条件可以是法定的，也可以是约定的)；③合同的解除必须有解除行为；④有解除权的一方必须在法律法定或合同约定的期限内行使合同的解除权；⑤合同解除使合同关系自始消灭或向将来消灭。

单项选择题

在从CDMA向LTE的标准方案重选中，eHRPD系统会新增下发的开销消息是（）。

A.quick config

B.sector parameter message

C.access parameter message

D.other rat neighbor list message
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单项选择题

When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of affliction and find ways to combat. Vaccination is one of the effective ways to protect the (1) population of a region or country which may be (2) grave risk. The process of vaccination allows the patient’s body to (3) immunity to the virus or disease so that, if it is encountered, one can fight it (4) naturally. To accomplish this, a small weak or dead (5) of the disease is actually injected into the patient in a controlled environment, (6) his body’s immune system can learn to fight the invader (7) . Information (8) how to penetrate the disease’s defenses is (9) to all elements of the patient’s immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that (10) the patient later come into contact with the real problem, his body is well equipped and trained to (11) with it, having already done so before.

There are, however, dangers (12) in the process. (13) , even the weakened version of the disease contained in the vaccine proves (14) much for the body to handle, resulting in the immune system (15) , and, therefore, the patient’s death. Such is the case of the smallpox vaccine, (16) to eradicate the smallpox epidemic that nearly (17) the whole Native American population and killed massive numbers of settlers. (18) 1 in 10,000 people who receive the vaccine (19) the smallpox disease from the vaccine itself and dies from it. Consequently, the process, which is truly a (20) , may indeed hide some hidden curses.

2（）

A.in

B.at

C.under

D.beyond
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