按要求把如图的实物元件连接起来,使小灯泡L1和L2并联,电流表测量电路的总电流,开关控制整个电路。
精子形成与卵细胞形成相比,具有 [ ]
A.同源染色体的分离
B.细胞质的分裂
C.变形(或分化)过程
D.染色体着丝点的分裂
根据语境。填人适当的词语或句子补全对话。
A: Where are you from?
B: I'm from Korea.
A: What are 1. manners in your country?
B: Korea is a country famous for its many native dishes. 2. food is rich in nutrition, well-balanced
and low in calories. They say that you can eat as much Korean food as you like and never gain weight.
A: Wonderful. I eat 3. . I like to eat nice things and keep slim at the same time,
B: Come to Korea then.
A: Is Korean food chiefly made of 4. ?
B: Yes, it is. Seasonings include garlic, red peppers, scallions, soy saucey fermented bean paste, ginger
and sesame oil.
A: 5. . the old or the young?
B: Of course, the oldest eat first. They are respected most in our country.