【简答题】单词拼写(10*2=20分) 小题1:______(混合) with 5 kinds of fruits, the dish tastes very special. 小题2:After the travellers drank a bottle of cola,they felt even___(口渴). 小题3:After reading this article, we learnt a l...
【单选题】用一个假想截面把杆件切为左右两部分,则左右两部分截面上内力的关系是,左右两面内力大小相等,( )
【单选题】用一个假想截面把杆件切开分为左右两部分,则左右两部分截面上的内力大小相等,( )
【单选题】下列关于电解质溶液中离子关系说法中正确的是( )
A.
常温下,向氯化铵溶液中加入少量氨水,使溶液pH>7:c(NH 4 + )>c(Cl - )>c(OH - )>c(H + )
B.
常温下,pH=3的醋酸溶液与pH=11的氢氧化钠溶液等体积混合后的混合液中:c(Na + )>c(CH 3 COO - )>c(OH - )>c(H + )
C.
0.1mol/LKHCO 3 溶液中的离子浓度关系:c(K + )=2c(CO 3 2- )+c(HCO 3 - )+c(H 2 CO 3 )
D.
在常温下, c( H + ) c( OH - ) =10 12 的溶液中,Fe 2+ 、Cl - 、NO 3 - 、Na + 能够大量共存
【单选题】According to what is said in the text, homework is important because ______. A) students will get very low grades if they do not do their homework B) it helps one know how to do things in the future C...
A.
students will get very low grades if they do not do their homework
B.
it helps one know how to do things in the future
C.
students cannot go to school if their homework is not done
D.
it shows how well students can manage their time
【简答题】阅读下列应用文及相关信息,并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。 首先请阅读下面六件产品的简介。 A. Bio Pac Dish Soap Bio Pac Dish Soap, with aloe and tea tree oil, has a fresh smell. It contributes a lot to green cleaning, for it is ma...
【单选题】语言不清。检查:血钾3 .5mmol/L,血钠136rA.m&/L,血氨90mmol/L,血清pH:7 .48。下列诊断哪项最正确
【单选题】下列关于生物电的叙述中,哪一项是错误的?
【单选题】A company wants to connect two new offices to their main office.One building is 2 miles away from the headquarters and the other is 12 miles away. The angle between the buildings is 80 degrees. Which ...
【单选题】下列关于生物电的叙述中,哪一项是错误的?
A.
感受器电位和突触后电位的幅度可随刺激强度的增加而增大