1.选择题- (共12题)
5.纯种的黑色长毛狗与白色短毛狗杂交，F1全是黑色短毛．F1代的雌雄个体相互交配，F2的表现型如下表所示．下列叙述正确的是（ ）
黑色短毛 | 黑色长毛 | 白色短毛 | 白色长毛 | |
雌（F2） | 52 | 19 | 16 | 6 |
雄（F2） | 49 | 14 | 15 | 5 |
6.纯种的黑色长毛狗与白色短毛狗杂交，F1全是黑色短毛．F1代的雌雄个体相互交配，F2的表现型如下表所示．下列叙述正确的是（ ）
黑色短毛 | 黑色长毛 | 白色短毛 | 白色长毛 | |
雌（F2） | 52 | 19 | 16 | 6 |
雄（F2） | 49 | 14 | 15 | 5 |
8.蝴蝶的体色，黄色（C）对白色（c）为显性，而雌的不管是什么基因型都是白色的．棒型触角没有性别限制，雄和雌都可以有棒型触角（a）或正常类型（A）．据下面杂交实验结果推导亲本基因型是（ ）
10.已知玉米子粒的有色与无色对相对性状的遗传涉及A、a和B、b两对等位基因．两种纯合类型的玉米杂交，F1子粒全为有色，用F1与纯合子粒无色品种做了两个实验．
实验1：F1×纯合子粒无色，F2的子粒表现型及数量比为有色：无色=3：1；
实验2：F1自交，F2的子粒表现型及数量比为有色：无色=15：1．
分析上述实验，回答下列问题：
11.已知玉米子粒的有色与无色对相对性状的遗传涉及A、a和B、b两对等位基因．两种纯合类型的玉米杂交，F1子粒全为有色，用F1与纯合子粒无色品种做了两个实验．
实验1：F1×纯合子粒无色，F2的子粒表现型及数量比为有色：无色=3：1；
实验2：F1自交，F2的子粒表现型及数量比为有色：无色=15：1．
分析上述实验，回答下列问题：
2.单项选择- (共9题)
13.
As ______ tourist attraction, the Summer Palace does have _______ strong attraction to visitors from home and abroad.
| A．the; / | B．the; a | C．a; / | D．a; the |
14.
The sun was shining brightly, ________ everything there ________ more beautiful.
| A．making; look | B．to make; looked | C．made; looking | D．making; be looked |
15.
Successful people have some good qualities and above all, they are never ________ a simple life so they keep fighting until they become top ones.
| A．content with | B．curious about | C．interested in | D．confident in |
16.
He walked down the hills, and ________ softly to himself.
| A．sing | B．singing | C．sings | D．was singing |
17.
Only _____ as an interpreter _____ how important it was to practise spoken English.
| A．when did I work…I realized | B．when did I work…did I realize |
| C．when I work…did I realize | D．when I worked…did I realize |
18.
Life is not measured by the number of breaths we take, but by the moments _______ take our breath away.
| A．that | B．when | C．what | D．who |
19.
One concern people have now is ______ printing passengers’ names and ID numbers on tickets will make it harder to protect their private information.
| A．whether | B．when | C．how | D．that |
20.
Those who are not admitted to university, ________, may attend some other courses or classes for adult higher education.
| A．though important | B．if possible | C．unless necessary | D．if ever |
试卷分析
-
【1】题量占比
选择题:(12道)
单项选择:(9道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：1
5星难题：0
6星难题：8
7星难题：0
8星难题：0
9星难题：0