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【简答题】
Finally, some good news about airplane travel. If you are on a plane with a sick passenger, you are unlikely to get sick. That is the 1 of a new study that looked at how respiratory ( 呼吸道 ) viruses 2 on airplanes. Researchers found that only people who were seated in the same row as a passenger with the flu, for example—or one row in front of or behind that individual—had a high risk of catching the illness. All other passengers had only a very 3 chance of getting sick, according to the findings. Media reports have not necessarily presented 4 information about the risk of getting infected on an airplane in the past. Therefore, these new findings should help airplane passengers to feel less 5 to catching respiratory infections while traveling by air. Prior to the new study, little was known about the risks of getting 6 infected by common respiratory viruses, such as the flu or common cold, on an airplane, the researchers said. So, to 7 the risks of infection, the study team flew on 10 different 8 in the U.S. during the flu season. The researchers found that passengers sitting within two seats on 9 side of a person infected with the flu, as well as those sitting one row in front of or behind this individual, had about an 80 percent chance of getting sick. But other passengers were 10 safe from infection. They had a less than 3 percent chance of catching the flu. A) accurate I) nearby B) conclusion J) respond C) directly K) slim D) either L) spread E) evaluate M) summit F) explorations N) vividly G) flights O) vulnerable H) largel
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【多选题】关于PMC子程序,下列说法正确的是:
A.
新建子程序步骤:【SYS】—+ —PMC梯图—编辑—列表—输入子程序号—新
B.
子程序是不能嵌套的,单独调用
C.
只能在二级程序中使用条件调用CALLU指令进行调用子程序
D.
需要使用子程序调用功能指令。
【多选题】下列关于磁盘碎片整理程序的功能,正确的说法是
A.
重新安排磁盘上文件的存储位置
B.
能提高磁盘的读写速度
C.
检查修复文件和磁盘的错误
D.
能释放磁盘的存储空间
【单选题】下列关于程序功能的说法正确的是()。
A.
编译程序的功能是将高级语言源程序编译成目标程序
B.
解释程序的功能是解释执行汇编语言程序
C.
Intel8086指令不能在Intel P4上执行
D.
C++语言和Basic语言都是高级语言,因此他们的执行效率相同
【多选题】下列销售预测方法中,属于定性分析法的有( )。
A.
德尔菲法
B.
推销员判断法
C.
因果预测分析法
D.
产品寿命周期分析法
【多选题】下列销售预测方法中,属于定量分析法的有( )。
A.
德尔菲法
B.
趋势预测分析法
C.
因果预测分析法
D.
产品寿命周期分析法
【单选题】德尔菲法属于()的销售预测方法。
A.
因果分析
B.
模拟
C.
定性预测
D.
时间序列
【简答题】常规设计依据材料力学及板壳理论,按 ( )准则来推导受压元件的强度尺寸计算公式。
【单选题】下列关于功能性注释不正确的说法是()。
A.
功能性注释嵌在源程序中,用于说明程序段或语句的功能以及数据的状态
B.
注释用来说明程序段,需要在每一行都要加注释
C.
可使用空行或缩进,以便很容易区分注释和程序
D.
修改程序也应修改注释
【单选题】下列销售预测方法中,不属于定性分析法的是( )。
A.
德尔菲法
B.
营销员判断法
C.
因果预测分析法
D.
产品寿命周期分析法
【多选题】关于锁模激光器,正确的说法有:
A.
锁模激光器是一定是多纵模激光器
B.
锁定的纵模越多,脉冲峰值功率越高,脉宽越窄
C.
锁定的纵模间存在固定的位相关系,不同纵模的叠加属于相干叠加
D.
锁模激光器重复频率与锁定的纵模数有关,与腔长无关
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