11. A two-digit number, after swapping the tens and units, generates a new two-digit number. The sum of the new number and the original number is 132. How many two-digit numbers satisfy this condition?
(A) 5
(B) 7
(C) 9
(D) 11
(E) 12
11. B.

Let the two-digit number that satisfies the condition be $10 a+b(a, b \in \mathbf{Z}_{+}, 1 \leqslant a, b \leqslant 9)$. Then, the new number obtained by swapping the tens and units digits is $10 b+a$.
$$
\begin{array}{c}
\text { Then }(10 a+b)+(10 b+a)=132 \\
\Rightarrow a+b=12 . \\
\text { Therefore, }(a, b)=(3,9),(4,8),(5,7),(6,6), \\
\quad(7,5),(8,4),(9,3) .
\end{array}
$$

Thus, there are 7 two-digit numbers that satisfy the condition.