进入青春期，人体的形态和功能都出现了显著变化，这是由于（） _爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

进入青春期，人体的形态和功能都出现了显著变化，这是由于（）

A．神经系统和内分泌的影响

B．生殖器官成熟的影响

C．大脑不断发育完善的影响

D．肺活量显著增大，心脏功能增强的影响

答案

答案：A

题目分析：进入青春期后，在神经系统的调节下垂体分泌的促性腺激素的增多，男性的睾丸和女性的卵巢都迅速发育，并逐渐成熟．能产生生殖细胞和分泌性激素，性激素能促进第二性征的出现，使得男孩和女孩的体形发生很大的变化，男孩身高突增，出现喉结、腋毛、阴毛以及声音变粗等，女孩也是身高突增，其次 * * 增大，脂肪积累增多，身体丰满，臀部变圆等。故A符合题意。

完形填空

"Just sign here, sir," the deliveryman said as he handed Oscar Reyna a package.
The package consisted of a long, narrow box 21 wrapped in brown paper. 22 the box, Oscar saw an umbrella inside — a very old one with a beautifully carved wooden handle. 23 he had not seen it in more than 20 years, he recognized it 24 .
Oscar was 16 when he first saw the 25 umbrella. He had gone to a concert with his grandparents. As they were leaving, h noticed an umbrella on an empty seat, impressed by its 26 , Oscar felt a strong desire to find its 27 .
Oscar 28 the manager to look in the record of advance ticket sales. Just as he thought, a name matched the seat 29 Oscar had found the umbrella. The name was Mrs. Katie O'Brien.
Oscar talked his grandparents into going by Mrs. O'Brien's 30 on their way home. He rang the bell, the door opened, and an elderly woman appeared. "May I 31 you?" she asked.
"I'd like to return it if it's yours," Oscar said, 32 the umbrella as if presenting a 33 that had long been wished for.
"Why, yes! It's mine," replied Mrs. O'Brien with a 34 smile and shining eyes. "It was given to me by my father years ago. Thank you so much for returning it. May I offer you a reward for your __35_ ?"
"No, ma'am," he said, "My grandmother says that a good deed is its own reward. "
"Well, that's 36 what my father used to say. What is your name, young man?"
Years later Oscar was staring at the finely carved handle of the umbrella as he remembered Mrs. O'Brien. It was in perfect condition, considering how 37 it was. Why had it arrived here today?
As if 38 , a note fell from the paper. It reads: Mrs. O'Brien wanted to 39 this umbrella as a present for a kind, 40. gesture long ago.

C．immediately

D．neighborhood

B．turning out

D．holding out

D．determination

A．in contrast

C．in exchange

B．significant

D．sympathetic

综合

读图，请回答下列问题。（每空1分，共5分）

(1)印度主要气候类型为气候，气候特征是_________

(2)此地气候6-9月为__________季，风由____________吹向___________