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【单选题】
基因型为 AaBbDd 的二倍体生物,其体内某精原细胞减数分裂时同源染色体变化如图所示。叙述正确的是 ( )A.
三对等位基因的分离均发生在次级精母细胞
B.
该细胞能产生 AbD 、 ABD 、 abd 、 aBd 四种精子
C.
B(b) 与 D(d) 间发生重组，遵循基因自由组合定律
D.
非姐妹染色单体发生交换导致了染色体结构变异
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【单选题】On television all over the world there are programmes about the work of the police. They are popular because they are usually very exciting. In London there is a television programme called 'Police Fi...
A.
it is on for five times every seven days
B.
it lasts five minutes a week
C.
it begins at five in the afternoon
D.
it is a programme about five policemen
【多选题】关于交强险说法正确的有
A.
在交通事故中无责任不承担赔偿
B.
第三方的人、车、物受到损伤或损坏
C.
受害人的故意行为（“碰瓷”）不予赔偿
D.
交强险于2006年7月1日正式施行
【单选题】Which of the following sentences is INCORRECT? A . Poultry are very expensive in the city . B . New machinery were introduced in the factory . C . The police are investigating the murder case D . The...
A.
Poultry are very expensive in the city ．
B.
New machinery were introduced in the factory ．
C.
The police are investigating the murder case
D.
The militia were called out to rescue flood victims ．
【简答题】根据所学主谓一致规则,判断以下句子正确还是错误。正确写T,错误写F。 1. Politics are the art or science of government. 2. Ten miles seems like a long walk to me. 3. Mumps is a kind of infectious disease. 4. All the furniture has arriv...
【简答题】用所给词的适当形式填空。 小题1:The police are looking for the __________(rob), but they still can’t find them． 小题2:The players all look forward to __________ (win)the ． 小题3:________he ________(take)the bus to t...
【单选题】依据《道路交通安全法》的规定，下列关于车辆通行的说法，正确的是（ ）。
A.
机动车通过没有交通信号灯的交叉路口时，应当减速慢行，并让行人先行
B.
机动车载运爆炸物品应当按最短路线、指定的时间和速度行驶
C.
电动自行车在非机动车道内行驶时，最高时速不得超过30km
D.
铰接式客车驶入高速公路，最高时速不得超过120km
【简答题】警察不愿卷入这种事情。 The police are very reluctant to get _____ in this sort of thing.
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