单绕式1∶1绕法的电梯,曳引钢丝绳在曳引轮上的包角一般取:()。
A.≥135°
B.<135°
C.>360°
参考答案:A
A local elementary school has requested scoliosis screening for its students from the hospital’s community outreach program. The school should be informed that
A. these students are too young to screen; instead, older students should be screened.B. these students are too old to screen and will no longer benefit from screening for scoliosis.C. scoliosis screening requires sophisticated equipment and can’t be done in school.D. this is an appropriate request and arrangements will be made as soon as possibl