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【单选题】
用触发器实现下图所示输出波形， 每一个【图片】和【图片】的周期内，可以等分为 段时间间隔相等的状态，需要电路有 种状态来实现。【图片】A.
3 ， 3
B.
4,2
C.
4,4
D.
3,4
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举一反三
【单选题】The old man bought a ticket ______.
A.
after he got on the train
B.
before he got on the train
C.
as soon as the conductor told him to buy one
【单选题】施工评标过程中，发现投标报价大写金额与小写金额不一致时，评标委员会正确的处理办法是（）。
A.
以小写金额为准修正投标报价并经投标人书面确认
B.
以大写金额为准修正投标报价并经投标人书面确认
C.
由投标人书面澄清，按大写或按小写来计算投标报价
D.
将该投标文件直接作废标处理
【简答题】光衰减器主要有两种类型:( ),( )。
【单选题】-- When did you_____? -- I’ve_____ _for two months.
A.
got married; been married
B.
be marred; been married
C.
get married; got married
D.
get marred; marred
【简答题】某火电厂有两台机组共同向负荷供电,其耗量特性和约束条件分别为: F 1 =0.02P 1 2 +2P 1 +10t/h , 20MW≤P 1 ≤60MW ; F 2 =0.03P 2 2 +3P 2 +16t/h , 20MW≤P 2 ≤60MW ; 求当有功功率负荷为 80MW 时的经济分配 方案, 并计算最优分配方案比平均分配方案每小时节约多少煤炭 。
【单选题】He soon ______from failure, and promised to work harder than before.
A.
got across
B.
got through
C.
got over
D.
got away
【单选题】They ________ with each other for two years before they got married. [ ]
A.
had fallen in love
B.
got in love
C.
had been in love
D.
fell in love
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