液压系统中应设过压保护装置，当工作压力达到额定压力的1.25倍，能自动动作。
1、正确正确
暂无解析
()______ismyumbrella?It'soverthere.
Juiceandwaterarehealthydrinks，_____Cokeisn'thealthydrink
()“CanIhelpyou?”“I'dlike______bagsofrice.”
()It'snineo'clock.Imust______.
阅读理解，根据短文内容判断正(T)误(F)。
It'sSundaymorning.ThestudentsofClass3aregivingtheirclassroomagoodcleaning.
MissHuang,theirteacher,isworkingwiththem.Thechildrenarebusy.Somearecarryingwater;
somearecleaningthewindows;othersaresweepingthefloor.ZhangHuaisputtingupamaponthe
wall.ItisamapofChina.WangFeiandWeiQingaremendingsomebrokenchairs.Thechildrenare.
listeningtotheradiowhiletheyareworking.Theclassroomlooksniceandbrightafterthecleaning.
Thechildrenareveryhappy.Theygohomeforlunchatnoon.
()1.ThechildrenareplayingintheirclassroomonSundaymorning.
()2.MissHuang,theirmother,isworkingwiththem.
()3.ThereisamapofChinaonthewall.
()4.Twoofthemarerepairingthebrokenchairs.
()5.Theyaresingingwhiletheyareworking.
