【单选题】After the class was over, the student apologized ___ the teacher ____ his coming late.
【单选题】苯二氮桌类镇静安眠药物中毒的特效解毒药为
【单选题】After the class was over, the student apologized _______ the teacher ______ his coming late.
【简答题】(14分)布洛芬、非诺洛芬、酮洛芬是一类芳基丙酸类非甾体抗炎药,具有抗炎作用强、毒副作用低的药效特点。 其中酮洛芬可由芳香族含氧衍生物A经以下路线合成得到: 请根据合成酮洛芬的路线回答下列问题。 (1)已知有机物A可以与NaHCO 3 反应,则A的结构简式为 。 (2)上述合成酮洛芬的路线有5步反应,其中属于取代反应的共有几步? 。其中有一步反应中用到有机物 ,请写出实验室保存该有机物方法: ...
【单选题】“No student,”the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission. ”
【单选题】________, Henry studied even harder after he entered the university.
A.
That always a diligent student
B.
Always a diligent student
C.
Always to be a diligent student
D.
Diligent student as he is
【单选题】如图所示,现浇板,保护层厚度取20mm,图中未注明的梁宽为300mm,轴线居中,分布筋间距为φ8@250,温度筋为φ8@200,图中②轴线②支座负筋内侧布置的分布筋长度为()。(图中支座负筋伸入板内的长度从梁中线起算)【图片】
【简答题】The adviser suggests ______ with another student after lectures over a coffee.
【单选题】移动支付就是允许用户使用其移动终端对所消费的商品或服务进行账务支付的一种服务方式,也称为