下列对中共的全面抗战路线的解释,正确的是()
A.动员全民族一切力量抗战
B.以游击战作为主要歼敌手段
C.反对以阵地战阻击敌人
D.突出人民作用而不以军队作战为主
参考答案:A
The bridge enables people to get to the island in less than an hour. The underlined part means "_ " [ ]
A. makes it safe for
B. makes it possible for
C. makes it necessary for
D. makes it enjoyable for
评价超声指向性优劣的指标是()
A.近场长度和扩散角
B.声束大小
C.声束形状
D.探头频率
E.聚焦程度