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【单选题】
All the following statements concerning the spermatic cord are true except
A.
It extends from the deep inguinal ring to the scrotum.
B.
It contains the testicular artery.
C.
It is covered by five layers of spermatic fascia.
D.
It contains the pampiniform plexus.
E.
It contains lymph vessels that drain the testis.
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【简答题】(14分) 填空回答下列问题: (1)水稻杂交育种是通过品种间杂交,创造新变异类型而选育新品种的方法。其特点是将两个纯合亲本的______通过杂交集中在一起,再经过选择和培育获得新品种。 (2)若这两个杂交亲本各具有期望的做点,则杂交后,F1自交能产生多种非亲本类型,其原因是F1在______形成配子过程中,位于______基因通过自由组合,或者位于______基因通过非姐妹染色单体交换进行重新组...
【判断题】"Ladies and gentleman" only refers to those cultured and refined men and women.
A.
正确
B.
错误
【单选题】Ladies and gentleman, welcome to my program. _______ me this evening is Dr. Gary.
A.
To join
B.
Join
C.
Joined
D.
Joining
【单选题】Ladies and gentleman,   please fasten your safety belts. The plane________. [     ]
A.
is going to be taken
B.
is taking off
C.
has taken off
D.
took off
【简答题】玉米的抗病和不抗病(基因为A、a)、高杆和矮杆(基因为B、b)是两对独立遗传的相对性状。现有不抗病矮杆玉米种子(甲),研究人员欲培育抗病高杆玉米,进行以下实验:取适量的甲,用合适剂量的γ射线照射后种植,在后代中观察到白化苗4株、抗病矮杆1株(乙)和不抗病高杆1株(丙)。将乙与丙杂交,F1中出现抗病高杆、抗病矮杆、不抗病高杆、不抗病矮杆。选F1中的抗病高杆植株上的花药进行离体培养获得幼苗,经秋水仙素...
【简答题】Goog morning, Ladies and gentleman. My topic is “________”. Now in the 21 st century, advertising is more and more important for people. Why? I think it is because through advertising, people, especia...
【单选题】Ladies and gentleman, please fasten your seat belts! The plane ________.
A.
takes off
B.
is taking off
C.
has taken off
D.
took off
【单选题】被判处管制的犯罪分子在判决执行前先行羁押的,羁押一日折抵刑期()。
A.
一日
B.
二日
C.
三日
D.
四日
【单选题】具有一对相对性状的纯合亲本杂交,获得F 1 。让F 1 与隐性纯合子测交,实验结果能验证的是 1F 1 的基因型 2F 1 产生配子的种类 3F 2 的基因型 4F 1 产生配子的比例
A.
①②③
B.
②③④
C.
①②④
D.
①③④
【单选题】"Well, ladies and gentleman, I think we should begin. Perhaps we’d better get down to business."---This moderating skill is _______.
A.
summarize
B.
state objectives
C.
stimulate discussion
D.
open the meeting
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