多系统引导系统GRUB只能安装在主MBR或当前系统分区的引导记录中。()
参考答案:错
选词填空
1. The moive is __________(boring; bored), but my father like it.
2. The computer game is very _______(exciting; excited).
3. Every boy is _______(interesting; interested) in the action moive.
4. Do you want to go toa moive with ______(I; me)
5. I learn ________(play; to play) soccer from my PE teacher(体育老师)
实验室用固体氯化钠配制l50g质量分数为6%的氯化钠溶液.
(1)主要步骤为______、______、______.
(2)实验过程中使用到的主要仪器有______、______、______、______.
(3)实验中需称量______g氯化钠固体,量取______mL水.
(4)配制过程中应选用下列哪种规格的量筒______(填序号).
A.100mL B.20mL C.50mL D.200mL
(5)若某同学量取了50mL的水,则她配制的氯化钠溶液的溶质质量分数______(填“大于”、“小于”或“等于”)6%.
(6)若已经准确配制出50g6%的氯化钠溶液,现在想用该溶液配制的50g3%的氯化钠溶液,则需要量取6%的氯化钠溶液______mL.(6%的氯化钠溶液的密度为1.04g/cm3),水______mL.需要使用下列哪些仪器______(填序号).
A.烧杯 B.量筒 C.托盘天平 D.玻璃棒.