八年级下册暑假作业答案-语文,数学,英语,历史,科学(4)

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  speak spoke spoken

  come came come

  give gave given

  hear heard heard

  send sent sent

  hurt hurt hurt

  see saw seen

  steal stole stolen

  take took taken

  sleep slept slept

  sit sat sat

  meet met met

  bring brought brought

  fly flew flown

  wake woke waken

  choose chose chosen

  lose lost lost

  read read read

  rise rose risen

  wear wore worn

  P50

  Early to bed

  Get up early to exercise every day

  To eat less fatty food and more milk.

  Do not eat too many sweet can cause obesity.

  In the case of hot weather drink plenty of water.

  Can not drink beverages,drink plenty of water.

  In the winter changes according to the right to add their own clothes to not cath a cold

  The eyes will not watch TV much,so choose the appropriate time watching TV.

  Playing games in not good for mental and physical,we need to less play

  科学选择题答案:

  专题一

  1. ACBD 增大 100% 降水

  P661.①水果导电性与它的酸性有关 ②水果导电性与它本身的质量无关

  2. 乙 避雷针 躲入建筑物内或就地蹲下

  专题二

  P55 压力不变时,受力面积减小,压强增大。

  BBCCBD

  受力面积 压强 490 增大 水的密度不变时,越深,水内部压强越大

  P57

  1.B 2.A A 暖 40 高压 冷锋 晴朗干燥 甲乙 A

  专题三

  二、1、B 2、(1)A (2)A(3)平流,50%-60%。

  3、(1)高压系统,冷锋系统,晴朗。

  (2)江苏。

  专题四

  二、

  1、A 2、B 3、C 4、D

  三、

  (1)难溶,乳浊。

  (2)会使鱼类大量死亡,破坏生态平衡。

  专题五

  一、略。

  二、1、C 2、B 3、C 4、C 5、D

  专题五

  1、C 2、B 3、C 4、C 5、D

  P62 四、糖尿病饮食包括主食:如粳米、富强粉;含热能低的食物如:青菜、白菜、黄瓜、冬瓜、番茄、豆腐、黄豆芽等;还有少量的瘦猪肉、鸡蛋。糖尿病的病人禁食葡萄糖、蔗糖、麦芽糖等纯糖食品

  专题六

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