【多选题】病害循环和生活史说法正确的是
A.
前者是以病原物寄主相互作用为对象,后者是以病原物为研究对象的
D.
研究生活史和病害循环都对植物病害的防治具有重要意义
【单选题】反求工程中形成集合参数坐标测量时采用的破坏性测量方法是( )
【单选题】The survery shows that if people cannot afford house, they will feel less content about ___life.
【简答题】复制图像时,常用的一种方法是按住( )键拖动图像时即可复制。
【判断题】犁耕阻力中的无效阻力对耕作毫无用处,可以设法完全消除。( )
【多选题】病害循环和生活史说法正确的是
A.
前者是以病原物与寄主相互作用为对象,后者是以病原物为研究对象的
D.
研究生活史和病害循环都对植物病害的防治都具有重要意义
【单选题】当转向开关打到左右两侧时,转向灯均不亮,检查故障时首先应( )。
D.
按下紧急报警开关观看转向灯是否亮,以此来判断闪光继电器
【单选题】Although people spend less time on their jobs, they still feel they do not have enough leisure time because of the following except ______.
A.
fulfilling family and social obligations
B.
spending some time with their children
C.
spending some time on learning
D.
doing physical exercises
【单选题】People who exercise _______________ are less likely to feel stress.
【单选题】Some people feel that television should give less ______ to sport.