凡从事生产经营，实行独立经济核算的纳税人，应自领取营业执照之日起30天之内，向当地税务机关申请办理纳税登记。（ ）
参考答案：对
In triangle ABC above, if ∠BAD and ∠ADB have measures of 4n, ∠ACB has a measure of n, and ∠DBC has a measure of 45°, what is the measure of ∠ABC ？（） (Figure not necessarily drawn to scale.)
A. 45°
B. 60°
C. 90°
D. 105°
E. 120°
第一次国共合作时期确定的“三大政策”是联俄、联共、扶助农工。
