下列变化属于物理变化的是[ ] A.湿衣晾干 B.食物腐烂 C.纸张燃烧 D.钢

题型:选择题

问题:

下列变化属于物理变化的是[ ]

A.湿衣晾干

B.食物腐烂

C.纸张燃烧

D.钢铁生锈

考点:物理变化和化学变化的特征和判别
题型:选择题

缺词填空。

    Peter is my good friend. He is very (1)g           . He is willing to (2)s            his things with us.

He is one of the (3)n            boys in my class. What's he (4)l           . He's friendly and helpful. He's

(5)r            to help us any time. He'd like to be a doctor when he (6)g           up. Lindy is (7)a          

my friend. Now she has (8)p            with her new school. She has no friends there. Sometimes, she

is very (9)n            and can't answer her classmates' questions. She is really uncomfortable at that

school. She hopes I can give her some (10)a          

题型:选择题
解方程组:
2x2-y2=-
1
2
2x-2
5
y=3
题型:选择题

下图为某区域量化水资源承载力的系统示意图。读图完成1~2题。

1、该区域水资源承载能力的大小[     ]

A、与人工生态需水量无关

B、不需考虑水质和境外跨流域调水因素

C、与地下径流量无关

D、随水资源开发阶段和条件不同而变化

2、图中箭头①集中表现在

[ ]

A、对地表状况的改变上

B、空气质量的高低上

C、生物数量的变化上

D、城市数量的变化上

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题型:选择题

用于过敏、镇静,但青光眼、癫痫、甲亢患者应慎用的是().

A.盐酸异丙嗪 

B.马来酸氯苯那敏 

C.盐酸苯海拉明 

D.茶苯海明 

E.盐酸地芬尼多

题型:选择题

用于有机氟杀虫农药中毒的解救药物是( )。

A.双解磷
B.亚硝酸钠
C.盐酸烯丙吗啡
D.谷胱甘肽
E.乙酰胺

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