When was the Yuantong Temple built? A: in early 8th century B: in mid 8th century C: in late 8th century

By mid-century, every single organ of the body can be grown, except the _____.

已知三阶矩阵$A$满足$\mid A-E\mid=\mid A-2E\mid=\mid A-3E\mid=0$，则$\mid A\mid$=( )。 A: $4$ B: $6$ C: $12$ D: $3$

设$A,B$是$n$阶正交矩阵，且$\mid A\mid=-\mid B\mid$，则( ). A: $A+B$可逆 B: $A+B$不可逆 C: $\mid A+B\mid=1$ D: $\mid A+B\mid=-1$

Wind technology is taking off so fast that by mid-century, it could surpass coal as the number-one power source on the grid.

We live in ( ) A: the twenty-first century B: the century twenty-one C: century twenty-one D: the century twenty-first

【单选题】In what century is the story of Hester Prynne set? A. The sixteenth century B. The seventeenth century C. The eighteenth century D. The nineteenth century

In the years from ___________the late 19th century to the early 20th century, when James lived and was engaged in literary creation, the major American and European capitalist countries entered the stage of imperialism. A: the late 17th century to the early 18th century B: the late 18th century to the early 19th century C: the late 19th century to the early 20th century D: the late 20th century to the early 21th century

The first clavichord in the world was probably invented in ____. A: the 14th century B: the 15th century C: the 13th century D: the 18th century

When was Dao De Jing brought to Europe? A: In the 17th Century B: In the 18th Century C: In the 15th Century D: In the 16th Century