Ifyouhavedifficultylocatingaparticularbook，pleaseaskourlibrariansfor___(assist).
下列叙述中正确的是（）
Thisessayisstilltoolong.I’llhaveto___(short)itbyoneortwopages.
Whenhewasarrested,Terry_________incrimeforyears.
一质点沿x轴作振幅为A的简谐振动，当t=0时，质点的位移恰好为x0=A.若振动的运动学方程用余弦函数表示，则质点振动的初相为()
