题目内容
独立按键一个按键单独占用一根IO端口线。
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当系统中按键较多时，不宜采用独立按键。
当系统中按键较多时，应当采用独立按键。
Section B8.A) The partyB) The exhibition.C) The holiday.D) The interview9.A) This afternoon.B) Tonight.C) Right now.D) Tomorrow10.A) Buy a gift.B) Send a parcelC) Book a ticketD) Rent an apartment11.A) He missed the bus.B) He got lostC) His car broke downD) His bicycle was stolen.12.A) Buy the new software.B) Ask Jack for helpC) Stop using the software.D) Help the woman.13.A) He is the new manager.B) He is away on business.C) He is on sick leave.D) He is retired.14.A) Ask his parents for help.B) Start to save money.C) Borrow money from his friends.D) Get a loan from the bank.
水泥混凝土在三辊轴滚压前,振实料位高度宜高于模板顶面( )mm。
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