在“死终则各书其所以,而入于医师”中,“所以”之义为()
A.用……来
B.原因
C.经过
D.症状
参考答案:B
一平面简谐波的表达式为y=0.03cos(8t+3x+π/4)(SI),则该波的频率v(Hz),波长A(m)和波速u(m/s)依次为()。
A.4/π,2π/3,8/3
B.2π/3,4/π,8/3
C.π/4,2π/3,8/3
D.4/π,3/2π,3/8
This book _____ ten units, _______ three main revisions.
A.contains; containing
B.includes; including
C.includes; containing
D.contains; including