题目:
天然的食品添加剂比人工化学食品添加剂合成的安全。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B
天然的食品添加剂比人工化学食品添加剂合成的安全。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/1105/cd5e0ea8b936ddd266186ca398b22864.html
下面是错误答案,用来干扰机器的。
参考答案:B
如图所示,电源电压不变,R1=20Ω,只闭合开关S时电流表的示数为0.15A,再闭合开关S1时,电流表示数是0.21A。求:
(1)电源电压。
(2)开关S、S1都闭合时,电阻R2的电功率。
以下不是小学生注意发展的特点的是()。
A.在教学的影响下,有意注意开始发展,而无意注意仍然发挥着重要作用
B.在教育教学的影响下,小学生对抽象材料的注意正在逐步发展
C.在整个小学学期内,教学的抽象性是引起儿童注意的重要条件
D.整个小学阶段,儿童的注意经常带有情绪色彩
患者女,35岁。因重度甲状腺功能亢进(简称甲亢)入院,择期手术治疗。在术前准备期间,患者害怕焦虑不安。
稳定患者情绪,解除焦虑的护理措施中哪项不妥()
A.酌情给予镇静剂
B.不回答有关手术的询问
C.不安排与重患者同住一室
D.避免刺激性语言
E.介绍与治疗成功的患者交谈
阅读理解。
Grown-ups know that people and objects are solid. At the movies, we know that if we reach out to
touch Tom Cruise, all we will feel is air. But does a baby have this understanding?
To see whether babies know objects are solid, T. Bower designed a method for projecting an optical
illusion (视觉影像) of a hanging ball. His plan was to first give babies a real ball, one they could reach out
and touch, and then to show them the illusion. If they knew that objects are solid and they reached out for
the illusion and found empty air, they could be expected to show surprise in their faces and movements.
All the 16-to 24- week -old babies tested were surprised when they reached for the illusion and found that
the ball was not there.
Grown-ups also have a sense of object permanence. We know that if we put a box in a room and lock
the door, the box will still be there when we come back. But does a baby realize that a ball that rolls under a
chair does not disappear and go to never-never land?
Experiments done by Bower suggest that babies develop a sense of object permanence when they are
about 18 weeks old. In his experiments, Bower used a toy train that went behind a screen. When
16-week-old and 22-week-old babies watched the toy train disappear behind the left side of the screen,
they looked to the right, expecting it to reappear. If the experimenter took the train off the table and lifted the
screen, all the babies seemed surprised not to see the train. This seems to show that all the babies had a sense
of object permanence. But the second part of the experiment showed that this was not really the case. The
researcher substituted (替换) a ball for the train when it went behind the screen. The 22-week-old babies
seemed surprised and looked back to the left side for the train. But the 16-week -old babies did not seem to
notice the switch (更换). Thus, the 16-week-old babies seemed to have a sense of "something permanence,"
while the 22-week-old babies had a sense of object permanence related to a particular object.
1. The passage is mainly about _____.
A. babies' sense of sight
B. effects of experiments on babies
C. babies' understanding of objects
D. different tests on babies' feelings
2. In Paragraph 3," object permanence" means that when out of sight, an object ______.
A. still exists
B. keeps its shape
C. still stays solid
D. is beyond reach
3. What did Bower use in his experiments?
A. A chair.
B. A screen.
C. A film.
D. A box.
4. Which of the following statements is true?
A. The babies didn't have a sense of direction.
B. The older babies preferred toy trains to balls.
C. The younger babies liked looking for missing objects.
D. The babies couldn't tell a ball from its optical illusion.
患者下肢或上肢有短缩畸形,腋杖长度的确定为()
A.可让患者穿上鞋或下肢支具仰卧
B.小趾前外侧15cm处与足底平齐处
C.肘关节屈曲90°,腕关节背伸时的掌面为把手部位
D.肘关节屈曲30°,腕关节背伸时的掌面为把手部位
E.小趾前外侧10cm处与足底平齐处